This patch supports to set or clear nocow flag in f2fs_io
Signed-off-by: Chao Yu <c...@kernel.org>
---
man/f2fs_io.8 | 4 ++--
tools/f2fs_io/f2fs_io.c | 10 ++++++++--
2 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index e58244c..5041c1b 100644
--- a/man/f2fs_io.8
+++ b/man/f2fs_io.8
@@ -16,11 +16,11 @@ Get the flags associated with the specified file.
.TP
\fBsetflags\fR \fI[flag] [file]\fR
Set an f2fs file on specified file. The flag can be casefold,
-compression, nocompression, and immutable.
+compression, nocompression, immutable, and nocow.
.TP
\fBclearflags\fR \fI[flag] [file]\fR
Clear the specified flag on the target file, which can be compression,
- nocompression and immutable.
+ nocompression, immutable, and nocow.
.TP
\fBshutdown\fR \fIshutdown filesystem\fR
Freeze and stop all IOs for the file system mounted on
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 00bfc7a..76f8e84 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -291,7 +291,8 @@ static void do_getflags(int argc, char **argv, const struct
cmd_desc *cmd)
" casefold\n" \
" compression\n" \
" nocompression\n" \
-" immutable\n"
+" immutable\n" \
+" nocow\n"
static void do_setflags(int argc, char **argv, const struct cmd_desc *cmd)
{
@@ -319,6 +320,8 @@ static void do_setflags(int argc, char **argv, const struct
cmd_desc *cmd)
flag |= FS_NOCOMP_FL;
else if (!strcmp(argv[1], "immutable"))
flag |= FS_IMMUTABLE_FL;
+ else if (!strcmp(argv[1], "nocow"))
+ flag |= FS_NOCOW_FL;
ret = ioctl(fd, F2FS_IOC_SETFLAGS, &flag);
printf("set a flag on %s ret=%d, flags=%s\n", argv[2], ret, argv[1]);
@@ -332,7 +335,8 @@ static void do_setflags(int argc, char **argv, const struct
cmd_desc *cmd)
"flag can be\n" \
" compression\n" \
" nocompression\n" \
-" immutable\n"
+" immutable\n" \
+" nocow\n"
static void do_clearflags(int argc, char **argv, const struct cmd_desc *cmd)
{
@@ -358,6 +362,8 @@ static void do_clearflags(int argc, char **argv, const
struct cmd_desc *cmd)
flag &= ~FS_NOCOMP_FL;
else if (!strcmp(argv[1], "immutable"))
flag &= ~FS_IMMUTABLE_FL;
+ else if (!strcmp(argv[1], "nocow"))
+ flag &= ~FS_NOCOW_FL;
ret = ioctl(fd, F2FS_IOC_SETFLAGS, &flag);
printf("clear a flag on %s ret=%d, flags=%s\n", argv[2], ret, argv[1]);
--
2.40.1
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